陈晓东,孙金华.大气电场仪场地因子修订及EMD分解分析[J].电子测量技术,2016,39(12):93-97
大气电场仪场地因子修订及EMD分解分析
Atmospheric electric field meter space factor Amendment and EMD decomposition analysis
  
DOI:
中文关键词:  大气电场  畸变效应  EMD  周期  电场仪
英文关键词:atmospheric electric field  distortion effect  EMD  cycle  field instrument
基金项目:
作者单位
陈晓东 张家港市华云科技服务有限公司张家港215600 
孙金华 张家港市华云科技服务有限公司张家港215600 
AuthorInstitution
Chen Xiaodong Zhangjiagang HuaYun Technology Service Co., Ltd., Zhangjiagang 215600, China 
Sun Jinhua Zhangjiagang HuaYun Technology Service Co., Ltd., Zhangjiagang 215600, China 
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中文摘要:
      由于地面电场仪安装的位置周围或多或少存在一定的建筑物,而建筑物会对大气电场形成一定的畸变效应,从而造成了电场仪测量值不准确。本文利用深圳地区坪地基地大气电场仪实测电场强度资料,采用了有限差分、经验模态分解(EMD)等方法,对深圳地区地面大气电场仪安装位置环境了场地修订,以及研究了深圳地区大气电场变化特征。研究表明,在远离建筑的位置大气电场电势为水平的等势线分布,而在靠近建筑物的位置处,对大气电场形成了一定的畸变,因此坪地基地大地电场仪测量值是不准确的,计算出的大气电场仪顶端的大气电场畸变系数为0.364 1;采用经验模态分解(EMD)方法,对大气电场强度日变化信号进行分解得出, 大气电场强度能够分解成9个IMF分量和1个趋势项,表明了深圳地区地面大气电场强度具有多个时间尺度的振荡周期变化。根据趋势项分量可以看出,一天内电场强度幅度整体呈现出逐渐增强的变化趋势。
英文摘要:
      Due to the location of the ground surrounding the installation of the electric field instrument more or less there are some buildings, but buildings have a certain atmospheric electric field distortion effect, resulting in inaccurate measurement values ??of the electric field. In this paper, Shenzhen, Ping and base atmospheric electric field instrument measured field strength data, using the finite difference, empirical mode decomposition (EMD) and other methods, the Shenzhen area ground atmospheric electric field instrument installation location environment of the site revised and studied Shenzhen atmosphere variation of the electric field. Studies have shown that (1) the potential away from the building location atmospheric electric field is horizontal equipotential line distribution, while at a location near the building of the atmospheric electric field formed a certain distortion, so the floor to base geodetic field measured value is inaccurate, atmospheric electric field distortion factor calculated atmospheric electric field instrument to the top is 0.364 1; (2) the use of empirical mode decomposition (EMD) method, the diurnal variation of atmospheric electric field strength signal decomposition concluded that the atmospheric electric field strength can be decomposed into 9 IMF component and a trend item, indicating that the Shenzhen area ground atmospheric electric field intensity oscillation cycle having a plurality of time scale changes. According to the trend term component it can be seen that the magnitude of the overall strength of the electric field day showing a gradual increase trends.
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